US4854275A - Cylinder head for a combustion engine - Google Patents

Cylinder head for a combustion engine Download PDF

Info

Publication number
US4854275A
US4854275A US07/209,051 US20905188A US4854275A US 4854275 A US4854275 A US 4854275A US 20905188 A US20905188 A US 20905188A US 4854275 A US4854275 A US 4854275A
Authority
US
United States
Prior art keywords
web
cylinder head
opening
window
insert
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/209,051
Other languages
English (en)
Inventor
Alfred Dobner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rio Tinto Alcan International Ltd
Original Assignee
Alcan International Ltd Canada
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcan International Ltd Canada filed Critical Alcan International Ltd Canada
Assigned to ALCAN INTERNATIONAL LTD. reassignment ALCAN INTERNATIONAL LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DOBNER, ALFRED
Application granted granted Critical
Publication of US4854275A publication Critical patent/US4854275A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/28—Cylinder heads having cooling means for air cooling
    • F02F1/30—Finned cylinder heads

Definitions

  • the invention relates to a cylinder head for a combustion engine which has at least one web insert in the bridge region of its wall delimiting the combustion chamber between the inlet and outlet valves, which web insert consists of a cast-in component and is embedded in said wall in such manner that its major dimension extends substantially perpendicularly to the surface thereof.
  • Such cylinder heads are already known.
  • the web inserts of sheet form which are provided form expansion joints in the material of the cylinder head when cast therein, which expansion joints are to be protected by the inserts against coking and are thus to be maintained functional for a long period.
  • the invention is therefore based on the object of preventing the appearance in a cylinder head of the above-mentioned type of heat cracks at the root of the expansion joint receiving the web inserts upon cooling of the cylinder head after its casting, that is to say by corresponding reduction of the shrinking forces exerted on the root of the expansion joint. Since as a result of the later heat treatment, the material stresses occurring upon cooling after casting are removed, the invention is particularly based on the object of preventing crack formation caused by shrinkage stresses at least until they are reduced by heat treatment.
  • the web insert has at least one opening, a window or a lateral cutout.
  • the expansion joint and its intended function that is to say the diversion of the tension and compression stresses caused by temperature fluctuation into the cooler regions of the material of the cylinder head, is fulfilled without the occurrence of cracks at the root of the expansion joint.
  • better material flow is achieved which reduces the formation of vortex induced oxide skins.
  • better heat flow results and thus better crystallisation as a result of which structural weaknesses and shrinkage cavities are prevented.
  • the web insert can have one or more such openings, or windows or lateral cutouts, these having various possible shapes, such as for example circular, slotshap, rectangular, square or the like.
  • the surface or the sum of the surfaces of the opening or openings or window or cutout should be so dimensioned that they can absorb at least the desired portion of the shrinkage stresses acting on the root of the expansion joint, but they must not be larger than the smallest cross-sectional surface of the bridge; with reference (strictly) to the depth of the web insert, in order to act as a rated break point under operational forces and not to nullify the effect of the expansion joint.
  • the spacing of the centre point of the opening or openings, windows or cutouts from the bridge surface amounts to at least a quarter of the overall depth of the web inserts.
  • t 1 Depth of the opening, measured from the end point of the web plate
  • FIGS. 1 to 3 show three exemplary embodiments in separate plan views
  • FIG. 4 shows the exemplary embodiment according to FIG. 1 in its cast-in condition with the parameters contained in the above-mentioned formula
  • FIG. 5 shows the arrangement of two web inserts according to the invention in a cylinder head in sectional view
  • FIG. 6 shows this arrangement in plan view of the base of the cylinder head
  • FIGS. 1 to 3 have equal dimensions and are upwardly domed into the upper region in the Figures which is to be cast into the cylinder head
  • the insert in the exemplary embodiment according to FIG. 1 has a single window-like opening 1 in the form of an elongate slot
  • the exemplary embodiment according to FIG. 2 has instead of this three window-like openings 2 in circular form.
  • two rows of small openings 3 are provided which are circular in cross section. All these openings ensure, after casting of the web insert into the cylinder head, interconnection of the material of the cylinder head located on both sides of the web insert, whereby the above-described advantages are achieved
  • FIG. 4 illustrates that the web inserts are cast only with their domed part containing the opening 1 into the cylinder head 4 in order that they extend with their major dimensions substantially perpendicularly to the surface thereof
  • the other part of the web insert forms an anchoring member 10 which during casting serves for fixing the web insert in the casting. It is then separated from the finished cast article with its length extending beyond the cast surface 11 by mechanical processing.
  • FIG. 4 furthermore shows the width of the gap s, which would result with cylinder heads 4 having a web insert 5 cast therein if it were not provided with the opening window or cutout according to the invention.
  • FIGS. 5 and 6 show a cylinder head which has two web inserts which are arranged on both sides of the web 7 located between the valve opening 6 in the base of the cylinder head.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
US07/209,051 1987-06-25 1988-06-20 Cylinder head for a combustion engine Expired - Fee Related US4854275A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873721029 DE3721029A1 (de) 1987-06-25 1987-06-25 Zylinderkopf fuer eine brennkraftmaschine
DE3721029 1987-06-25

Publications (1)

Publication Number Publication Date
US4854275A true US4854275A (en) 1989-08-08

Family

ID=6330294

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/209,051 Expired - Fee Related US4854275A (en) 1987-06-25 1988-06-20 Cylinder head for a combustion engine

Country Status (5)

Country Link
US (1) US4854275A (cs)
EP (1) EP0296320B1 (cs)
AT (1) ATE71187T1 (cs)
DE (2) DE3721029A1 (cs)
ES (1) ES2027721T3 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3837254A1 (de) * 1988-11-03 1990-05-10 Bayerische Motoren Werke Ag Leichtmetall-einlage fuer die bildung einer dehnfuge in aus leichtmetallguss gebildeten brennraumwaenden von brennkraftmaschinen, insbesondere zylinderkopfboden von diesel-brennkraftmaschinen
EP3374621B1 (en) 2015-11-11 2020-10-28 Ford Otomotiv Sanayi Anonim Sirketi Multi-piece cylinder head
DE102018007546A1 (de) * 2018-09-25 2020-03-26 Rheinisch-Westfälische Technische Hochschule (Rwth) Aachen Verfahren zur Herstellung eines Hybridbauteils

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337735A (en) * 1979-02-09 1982-07-06 Klockner-Humboldt-Deutz Aktiengesellschaft Light metal cylinder head for a valve-controlled internal combustion engine
US4426963A (en) * 1980-09-13 1984-01-24 Klockner-Humboldt-Deutz Aktiengesellschaft Light metal cylinder head for a valve-controlled internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1734875U (de) * 1955-02-12 1956-11-29 Daimler Benz Ag Zylinderkopf.
DE1294093B (de) * 1967-10-25 1969-04-30 Kloeckner Humboldt Deutz Ag Zylinderkopf fuer Brennkraftmaschinen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337735A (en) * 1979-02-09 1982-07-06 Klockner-Humboldt-Deutz Aktiengesellschaft Light metal cylinder head for a valve-controlled internal combustion engine
US4426963A (en) * 1980-09-13 1984-01-24 Klockner-Humboldt-Deutz Aktiengesellschaft Light metal cylinder head for a valve-controlled internal combustion engine

Also Published As

Publication number Publication date
EP0296320B1 (de) 1992-01-02
DE3721029C2 (cs) 1989-09-21
DE3867331D1 (de) 1992-02-13
ATE71187T1 (de) 1992-01-15
EP0296320A2 (de) 1988-12-28
DE3721029A1 (de) 1989-01-05
ES2027721T3 (es) 1992-06-16
EP0296320A3 (en) 1989-11-29

Similar Documents

Publication Publication Date Title
EP0628716B1 (en) Cylinder block for an internal combustion engine
US4683844A (en) Cylinder block and head assembly for internal combustion engines
KR100828978B1 (ko) 냉각요소를 포함하는 노
US4854275A (en) Cylinder head for a combustion engine
EP0295481A2 (en) Pistons
JPH0229860B2 (cs)
CA1196537A (en) Cylinder-head for an internal combustion engine
US6926067B1 (en) Liquid-cooled casting die
KR890000752B1 (ko) 내연기관의 실린더헤드와 피스톤헤드 및 그 제조방법
US4686943A (en) Closed-deck cylinder block for water-cooled internal combustion engines
JP2870463B2 (ja) 多気筒内燃機関のシリンダヘッド構造
US4567859A (en) Cylinder head structure for internal combustion engines
US4741253A (en) Piston for internal combustion engines
US3336973A (en) Continuous casting mold
ITMI941267A1 (it) Accoppiamento a viti della testa cilindri di un motore a combustione interna
RU2000100987A (ru) Головная часть кристаллизатора для вертикальной непрерывной разливки под нагрузкой для изготовления металлических изделий удлиненной формы
EP1143135B1 (en) Cooling water channel structure of a cylinder head and method of manufacturing a cylinder head
US6988480B2 (en) Cylinder block for an internal combustion engine having a locally thickened end wall
US4572269A (en) Method of manufacturing cooling plates for use in metallurgical furnaces and a cooling plate
US4074617A (en) Pistons for internal combustion engines or for compressors
JPS5943944A (ja) オイル冷却ピストン
US6899064B2 (en) Cylinder block for an internal combustion engine having a tapered coolant jacket
JPS62203966A (ja) 熱疲労耐力のあるシリンダヘツド
SU1435383A1 (ru) Прибыльна надставка
KR20010021233A (ko) 냉각 요소

Legal Events

Date Code Title Description
AS Assignment

Owner name: ALCAN INTERNATIONAL LTD., 1188 SHERBROOK STREET WE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DOBNER, ALFRED;REEL/FRAME:004904/0874

Effective date: 19880606

Owner name: ALCAN INTERNATIONAL LTD., CANADA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DOBNER, ALFRED;REEL/FRAME:004904/0874

Effective date: 19880606

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19970813

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362